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Loaded Firefox 4. Said Mac 10.4.11 can not handle 4. Firefox gone!

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After downloading Firefox 4, I received a message that 4 will not work with my MacBook, 10.4.11. In downloading though, 3 must have been overwritten or something as I can not locate a working version of 3 in this computer. How do I regain use of the older version of Firefox as 4 does not seem to work?

Thanks for your time and help.

After downloading Firefox 4, I received a message that 4 will not work with my MacBook, 10.4.11. In downloading though, 3 must have been overwritten or something as I can not locate a working version of 3 in this computer. How do I regain use of the older version of Firefox as 4 does not seem to work? Thanks for your time and help.

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Firefox 4 requires at least OS x 10.5 and an Intel Mac. You can get the latest version of Firefox 3.6 from http://www.mozilla.com/en-US/firefox/all-older.html